Electronic Components Datasheet Search |
|
SC4602BEVB Datasheet(PDF) 1 Page - Semtech Corporation |
|
SC4602BEVB Datasheet(HTML) 1 Page - Semtech Corporation |
1 / 18 page 1 www.semtech.com SC4602A/B High Efficiency Synchronous, Step Down Controller POWER MANAGEMENT Revision: January 20, 2006 Description Features Applications Typical Application Circuit BICMOS Voltage mode PWM controller 2.75V to 5.5V Input voltage range Output voltages as low as 0.8V +/-1% Reference accuracy Sleep Mode (Icc = 10µA typ) Lossless short circuit current limiting Combination pulse by pulse & hiccup mode current limit High efficiency synchronous switching Up to 100% Duty cycle range Synchronization to external clock 8-Pin MSOP surface mount package. Lead-free pack- age available, fully WEEE and RoHS compliant Distributed power system RF power supply Local microprocessor core power supplies DSP and I/O power supplies Battery powered applications Servers and workstations The SC4602A/B is a voltage mode step down (buck) regu- lator controller that provides accurate high efficiency power conversion from an input supply range of 2.75V to 5.5V. A high level of integration reduces external com- ponent count and makes it suitable for low voltage appli- cations where cost, size and efficiency are critical. The SC4602A/B drives external complementary power MOSFETs; P-channel on the high side and N-channel on the low side. The use of high side P-channel MOSFET eliminates the need for an external charge pump and simplifies the high side gate driver. Non-overlap protec- tion is provided for the gate drive signals to prevent shoot through of the MOSFET pair. Voltage drop across the P- channel MOSFET during its conduction is sensed for lossless short circuit current limiting. A low power sleep mode can be achieved by forcing the SYNC/SLEEP pin below 0.8V. A synchronous mode of op- eration is activated as the SYNC/SLEEP pin is driven by an external clock. The quiescent supply current in sleep mode is typically lower than 10µA. A soft start (2.4ms for the SC4602A and 1.2ms for the SC4602B) is internally provided to prevent output voltage overshoot during start- up. A 100% maximum duty cycle allows the SC4602A/B to operate as a low dropout regulator in the event of a low battery condition. The SC4602A/B has fixed switch- ing frequency (300KHz for the SC4602A and 550KHz for the SC4602B). The SC4602A/B is an ideal choice for 3.3V, 5V or other low input supply sytems. It’s available in a 8 pin MSOP package. C2 6.8n R1 5.11k C7 150u C1 470p R6 1.0 R5 1.0 L1 1.6u C4 22u M2 Vo = 1.5V (as low as 0.8V )/6A C10 22u C11 22u C12 22u C13 22u C9 3.3n R8 169 R7 4.64k R9 5.36k VCC 1 SYNC/SLEEP 2 COMP 3 VSENSE 4 PHASE 5 GND 6 NDRV 7 PDRV 8 U1 SC4602B C3 4.7u M1 R15 1 Vin = 2.75V ~ 5.5V * External components can be modified to provide a V OUT as low as 0.8V. |
Similar Part No. - SC4602BEVB |
|
Similar Description - SC4602BEVB |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |